Energy Management Device Of The Household Photovoltaic Energy Storage System

In the household photovoltaic energy storage system,how to realize monitoring and control and protection of the operating state and main parameters of the household photovoltaic cells and storage batteries and household loads and AC grids networks,how to coordinate the reasonable allocation of energy in the household photovoltaic cells and storage batteries and household loads and AC grids,it is a great significance to study the energy management device of the household photovoltaic energy storage system.The research background and the purpose and the significance is described in this paper,it makes a detailed analysis of the development and research status of domestic and foreign energy management device.The functions and control scheme and working principle of energy management devices are described in this paper,determine the overall architecture of the energy management device.In the hardware platform design,ARM 11 series S3C6410 as the core controller.Hardware circuit design including power supply interface circuit and USB interface circuit and communication interface circuit and SD card interface circuit and LCD capacitive touch screen interface circuit.For the energy management software platform,Qt and embedded Linux operating system are used as software development platform in paper.Built host platform and embedded Linux operating system transplant,select SQlite as background database of the energy management device,energy management device has the function of data storage.The communication modes used in energy management device are RS232 and RS485 and SX1278 and Ethemet.RS232 mainly realizes the data communication between the energy management device and the user load.RS485 mainly realizes the energy management device and the external environment and the household photovoltaic cell and the AC power network data communication.SX1278 mainly realizes the data communication between energy management devices and energy storage batteries.Ethernet as the communication tools between energy management device and host computer.Selcet Qt software design energgy management device application program and man machine interface,cross compilation of energy management device application program to hardware platform.Set up the hardware test platform of energy management device in laboratory for the function testing.Testing show that satisfies the demand of system.Energy management device has the advantages of amall size and low power consumption and easy operation,it has a good market application prospect.